LogCat中的错误提示如下:
04-29 09:43:23.390: E/AndroidRuntime(24967): FATAL EXCEPTION: main
04-29 09:43:23.390: E/AndroidRuntime(24967): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.baidu.map/com.baidu.map.RoutePlan}: java.lang.NullPointerException
04-29 09:43:23.390: E/AndroidRuntime(24967): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1729)
04-29 09:43:23.390: E/AndroidRuntime(24967): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1745)
04-29 09:43:23.390: E/AndroidRuntime(24967): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
04-29 09:43:23.390: E/AndroidRuntime(24967): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
04-29 09:43:23.390: E/AndroidRuntime(24967): at android.os.Handler.dispatchMessage(Handler.java:99)
04-29 09:43:23.390: E/AndroidRu